Manufacture of a fish food.



J. DAVIDSON.

MANUFACTURE OF A FISH FOOD. APPLICATION FILED JUNE 1s, 1912.

1,047,760, Patented Dec.17,1912.

STATES JOHN DAVIDSON, or WICK, SCOTLAND.

manoreo'runn or A risH noon.

Specification of Letters Patent.

Patented Dec. 17,1912.

Application filed June 13, 1912. Serial No. 703,500.

To all whom it may concern:

Be it known that I, JOHN DAVIDSON, a subject of the King of Great Britain, residing at Wick, Scotland, have invented new and useful Improvements in the Manufacture of a Fish Food, of which the following is a specification.

This invention relates to an improved method of preparing sterilized fish in the form of dry flakes which can be used ina variety of ways for preparing dishes for the table,

My improved method is of the kind wherein the entrails, skin and large bones are removed'from the fish, and the remaining flesh or edible portion of the fish istreated or worked in a mincing machine or the like to reduce it to a pulp, which is then mixed with flour, again worked and dried, the product being brought into the market in the form of flakes.

According to the present invention, I adapt to the drying ofa fish food of the kind above mentioned, a known type of 'dryingmachine, comprising for example, two rotary heated rollers arranged close together on to which the material to be dried is fedina fluid form and from which it is removed by stripping knives or scrapers.

- oughly steepedl I then proceed to cook, dry.

According to my improved method the entrails, skin and large bones are removed from the fish and the remaining flesh .is then thoroughly washed and passed once, twice or oftener through a mincing. machine which reduces the flesh to a pulp, and breaks down and sterilize this mixture as hereinafter described, whereby while producing a dried fish preparation which retains the full flavor of the fish I am enabled to prevent such in the product as would muse it to an mre a strong fishy odor and taste. For the purposes of my invention, I employ two hollow metal rollers or cylinders mounted in a framewhich keeps them presed together, and heated by steam or otherwise to a temperature slightly above the cooking temperature of the fish under treatment, and I pour-the raw mixture above described in the space between the rollers, which are kept slowly revolving. The mass of fish resting on the rollers undergoes a cooking operation due to the heat, and the thin layer of the fish mixture which passes between therollers and adheres to the surfaces thereof is'furcontact with the rollers. While the film adheres to each roller; a current of heated air is directed on to the same to assist or in crease the rate of evaporation of moisture from the mixture to quickly remove the moisture thus evolved, .and to thoroughly sterilize the mixture. The rotation of the rollers brings the films of fish material adsurfaces arranged near to said knives and pleted. The sheets thenfall into a box or other receptacle arranged to receive them in stick-together and in. which they can be readily broken up into I flakes after cooling. They are then kept for some time exposed to the air to'cool and mature.

In the accompanying drawing, I have shown, diagrammatically, an apparatus for conveniently and advantageously carrying into practice the manufacture of my improved fish food preparation.-

nozzles c, can be dispensed with and the air be drawn in by the suction of the exhaust pipe 0 through spaces left between the penpheries of the rollers 41, a, and the upper edges of the side walls of the box 5. I I

thercooked and partially dried by direct hering thereto into contact with stripping knives or scrapers'which remove the said" material and deliver it to auxiliary heating As shown in this drawing, a, a indicate. rollers heated by steam or otherwise and arranged substantially in contact with each other, the space above and between said, roll-' ers being shut in at the ends by plates a.-

whereon the drying of the material is coma condition in which they are not liable to faces of the rollers or films. If desired, the

plate 9 is indicated at h and heating pipes a are provided to maintain the plates 9 at'a suitable temperature. These plates may, however, be heated by conduction or radiation of heat from the rollers, by means of gas flames, or in any other convenient manner.

What I claim is 1. A method of manufacturing a fish food preparation, wherein the flesh of fish after having been reduced to a pulp, is mixed with a starchy powder and water, and the mixture is poured into the space above a pair of revolving heated pressure rollers where it undergoes a cooking operation, and then passes between the rollers to which it adheres in thin layers being thereby sterilized and partially dried, the thin layers of material being subsequently removed from the rollers by means of stripping knives and delivered to auxiliary heating surfaces whereby they are completely dried.

2. A method of manufacturing a fish food preparation, wherein the flesh of fish, after having been reduced to a pulp, is mixed with ,a'starchy powder and water which has been brought to the consistency of milk before it is mixed with the fish pulp, whereupon the mixture is worked, allowed to stand and then poured into the space above a pair of revolving ,heated pressure rollers, where it undergoes a cooking operation and then passes between the rollers to which it, adheres in thin layers, being thereby sterilized and partially dried, the said layers of material being subsequently removed from the rollers and completely dried on auxiliary heating surfaces.

3. A method of manufacturing a fish food preparation, wherein the flesh of fish, after being reduced to a pulp, is mixed with a starchy powder and .water and the mixture is poured into the space above a pair of revolving heated pressure rollers, where it undergoes a cooking operation, and then passes between the rollers, to which it ad heres in thin layers, being there subjected to the action of a current of heated air until it is sterilized and partially dried, the thin layers of materialbeing subsequently removed from the rollers and completely dried on auxiliary heating surfaces.

JOHN DAVIDSON. Witnesses:

JAM s WHITELAW,. FREDERICK PIATT. 

